Spatial interpolation between two images/frames.

Question

Ivan Shorokhov 2016-2-8

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/267132-spatial-interpolation-between-two-images-frames

评论： Image Analyst 2016-2-8

Hello everybody,

[Wanted]: I want to estimate (interpolate) middle image between two frames in 'xylophone.mp4', for example I would like to to estimate new frame between existing frames 4 and 6.

[What has been done so far]: Here is what I have done so far:

close all; clear all; clc;
vidObj = VideoReader('xylophone.mp4');
vidHeight = vidObj.Height;
vidWidth = vidObj.Width;
s = struct('cdata',zeros(vidHeight,vidWidth,3,'uint8'),...
    'colormap',[]);
k = 1;
while hasFrame(vidObj)
    s(k).cdata = readFrame(vidObj);
    k = k+1;
end
figure(1);
subplot(1,2,1);imshow(s(4).cdata); title('4th frame');
subplot(1,2,2);imshow(s(6).cdata); title('6th frame');
im1=s(4).cdata;im2=s(6).cdata; t=0.5;
imnew = (1-t)*im1 + t*im2; % linear combination of them.
figure(2);
subplot(1,2,1); imshow(s(5).cdata); title('5th frame');
subplot(1,2,2); imshow(imnew); title('5th frame');

[Need help with]

Estimate/interpolate image between frame 4 and 6, using following methods: 'nearest','cubic','spline','linear'.

I'm not sure what function should I use ... interp2 or interp3 and how to use it. I have tried to use Vq = interp2(im1,im2,'nearest'); but I got an error, so that is no the way how it should be used.

Thanks in advance for any help (@Image Analyst),

Ivan

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Image Analyst 2016-2-8

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/267132-spatial-interpolation-between-two-images-frames#answer_208988

I don't know about interp3 - I haven't used it. interp2() required 2D images so to use that you'd use it on each color channel one at a time. It will basically give you the average of the images so you'd have two hands in it, like you have but each would be blended with the background. You would not get one hand in between the two hand positions. There might be algorithms for that, but I don't know what they are.

4 个评论
显示 2更早的评论隐藏 2更早的评论

Ivan Shorokhov 2016-2-8

编辑：Ivan Shorokhov 2016-2-8

Thank you, then I'm wondering how the author managed to do it in the following publication http://fbt.tums.ac.ir/index.php/fbt/article/viewFile/50/45 I guess he was using interp3.